@ ProgramNode (location: (0...7))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...7))
    └── body: (length: 1)
        └── @ RegularExpressionNode (location: (0...7))
            ├── opening_loc: (0...1) = "/"
            ├── content_loc: (1...6) = "\\cC\\d"
            ├── closing_loc: (6...7) = "/"
            ├── unescaped: "\u0003d"
            └── flags: ∅
